Actually, I've heard voices when using my desktop (Win XP) computer. I've also heard what I would describe as the tapping-out Morse code on a
telegram machine. I believe both are the result of telecommunications interference caused, most likely, by linemen out working on telephone lines (I have DSL Internet service). I recall this issue being posted before in forums. And, I believe my son, who sometimes uses my computer, has heard the abnormal sounds.
One fact I believe I can correctly state about sounds I've heard is that they usually occur during the day. And, I'd say that tends to corroborate the theory that it's due to linemen out working on telephone lines.
So, don't worry @@, I don't think you need to see a psychiatrist.
But, if that was your photo you posted, you are a bit overdue some dental work.